Manufacture of hydrochloric acid.



lUNTT sTATEs PATENT oEEioE.

JAMES IBQGARNER AND HOWARD 1). CLAYTON, or PITTSBURGH, PENNSYLVANIA, ASSIGNORS To METALS RESEARCH COMPANY, or NEW YGRK, it. in, A coEroEa- TION OF MAINE.

No Drawing.

To all whom it may concern:

Be it known that we, JAMES B. GARNER and HOWARD D. CLAYTON, both citizens of the United States, residing, respectively, at Pittsburgh, Allegheny county, Pennsylvania, have invented certain new and useful Improvements in Manufacture of Hydrochloric Acid; and we do hereby declare the following to be a full, clear, and exact description of. the invention, such as will enable others skilled in the art to which it appertains to make and use thesame.

The present invention relates to the manufacture of hydrochloric acid in a commercial way, and is based upon the discovery that hydrogen and chlorin, in the presence of a suitablecatalyzer, such as wood charcoal, will react smoothly, quietly, and quantitatively to produce hydrogen chlorid which may then be dissolved in water to produce.

hydrochloric acid ofthe desired strength.

In the practice,of the invention, the hydrogen and chlorin can he first dried by passing them separately through concentrated sulfuric acid. After drying, they are led in equal volumes into a chamber more or less completely filled with-ordinary wood charcoal and so constructed daylight is excluded. 1

The chamber containing the charcoal and hydrogen and dry chlorin that most of the are led in equal 7 perature of 520 0. Under these conditions saturated for the the gases unite quietly and completely to form 'hydrogen chlorid. -This latter gas passes from the chamber containing the charcoal and is absorbed. by water in the usual manner to form the solution commonly called muriatic or hydrochloric acid. The acid can be made in this manner of any desired strength, upto that of a solution temperature at which the absorption takes place. is free of chlorin. 7

As' hereinbefore indicated, the gases can advantageously be dried before their admission into the chamber containing the catalyzer, for the reason that present the reaction when equal volumes 0 if moisture is roceeds too violently hydrogen and chlorin Specification of Letters Patent.

State of low about 340 volumes is heated to a tem- The acid produced MANUFACTURE OF HYDR OCHLOBIC ACID.

Patented Mar. at, not an,

Application filed March 4; 1915. Serial No. 12,133.

are used. We have discovered, however, that required for the reaction is about 340 C.

All the chlorin combines with the re uisite amount of hydrogen to form hy rogen chlorid and the excess of hydrogen passes off with the hydrogen chlorid from the reaction chamber and not being soluble in water may be recovered and again run through the system.

What we claim is: V

1-. The method of making hydrochloric acid which comprises causing hydrogen and chlorin to react at a temperature of not be- 0. in the presence of wood charcoal, moist ure being present in the reacting gases and the hydrogen being emand recovering the hydro-7 ployed in excess, chloric acid thus formed; substantially as described.

provided the hydrogen is 2. The method of. making hydrochloric acid which comprises causing hydrogen and chlorin in the proportion of about fifty parts of hydrogen by' volume to 35 arts of chlorin to react ata temperature 0 about 340 C. in thepresence of wood charcoal, moisture being present in the reacting gases, and dissolving in water the hydrochloric acid thus formed; substantially as described.

3. The method of making hydrochloric acid, which comprises causing. "hydrogen and chlorin to react in the presence of wood charcoal at a temperature of not below about 340 (3., and combining the resulting hydrochloric acid with water to form a solution of hydrochloric acid; substantially as describedfi In testimony whereof wev afix our signatures, in presence of two witnesses.

Witnesses:

W. J. MooBE, M. R. HAINER. 

